JP2004046077A - Musical sound signal generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a musical sound signal generating device which can be constituted relatively at a low cost and can impart a variety of effects to a plurality of musical sound signals. <P>SOLUTION: Sounding elements 7-1 to 7-n generate musical sound signals. A pitch LF 020, a pitch EG21 and an amplitude LF023 are timbre addition modules for delicately varying the musical sound signals generated by the sounding elements 7. Selectors 15-1 to 15-n and 16-1 to 16-n switch to determine whether outputs of the timbre addition modules operate on the sounding elements 7. A filter LF029, a filter EG30, a synthesizing circuit 31 and a time variation filter 28 finely vary timbres of the musical sound signals outputted from the sounding elements 7. Selectors 25-1 to 250n switch to determine whether or not the outputs of the sounding elements 7 are to be supplied to the time variation filter. In this constitution, a small number of timbre addition modules can add timbres to many sounding elements 7. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a simplified tone signal generation device suitable for use in a portable terminal device or the like.
[0002]
[Prior art]
As is well known, an electronic tone signal generating device includes a tone generator that generates a tone signal, and a tone module that delicately changes the tone by adding effects such as tremolo and vibrato to the tone signal generated by the tone generator. It is composed of In addition, a recent tone signal generation device has a plurality of pronunciation elements, and can simultaneously form a plurality of tone signals.
[0003]
By the way, in a tone signal generating device having a plurality of pronunciation elements, as shown in FIG. 8, it is preferable to provide a tone color module corresponding to each pronunciation element in order to form various musical sounds in each pronunciation channel. . However, the provision of the tone color module corresponding to each sounder in this way leads to an increase in cost in a situation where the number of sounding channels has been increasing recently, and particularly, in the case of a musical sound such as a mobile phone which requires a low price. This is not preferable as a signal generation device.
[0004]
On the other hand, as shown in FIG. 9, one tone color module has been provided for a plurality of pronunciation elements. However, in such a configuration, only a common effect can be given to each tone signal, and there is a disadvantage that the generated tone is monotonous. As a conventional technique, a “musical sound data processing device” described in Patent Literature 1 is known. This device can selectively add an effect to the reproduction data of each channel. However, the device described in Patent Document 1 supports only one tone synthesis method (specifically, the WT method), and cannot be applied to an apparatus that generates tone data using a plurality of tone formation methods. Can not.
[0005]
[Patent Document 1]
JP-A-2000-122650 (page 4-5, FIG. 3)
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of such circumstances, and its object is to make it relatively inexpensive, and to give various effects to a plurality of tone signals. It is an object of the present invention to provide a tone signal generation device that can be applied to a plurality of tone synthesis devices.
[0007]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an invention according to claim 1 is provided with at least one pronunciation element for synthesizing a musical tone based on a first musical tone synthesizing method, and the first musical tone synthesizing method. A plurality of sound generators each generating at least one independent tone signal, and at least a part of the plurality of sound generators, each of which generates an independent tone signal. And a plurality of switching means for switching whether or not to apply the tone color adding module to each of the plurality of pronunciation elements. It is a musical tone signal generation device.
[0008]
According to a second aspect of the present invention, at least one sound generator for synthesizing a musical tone based on a first musical tone synthesizing method and a musical tone based on a second musical tone synthesizing method different from the first musical tone synthesizing method. A plurality of sound generators each including at least one sounder, each of which generates an independent tone signal; and a tone color changing means for performing a predetermined process on a sound signal output from at least a part of the plurality of sounders. And a switching means for switching whether or not to output each of the plurality of pronunciation elements to the tone color changing means.
According to a third aspect of the present invention, at least one sound generator for synthesizing a musical tone based on a first musical tone synthesizing method, and a musical tone based on a second musical tone synthesizing method different from the first musical tone synthesizing method. A plurality of sound generators each including at least one sounder and generating an independent tone signal; and a tone color adding module for performing a predetermined process on a sound signal generated by at least a part of the plurality of sounders. First switching means for switching whether or not the output of the tone color adding module is applied to each of the plurality of sounders; and a predetermined process for a tone signal output from at least a part of the plurality of sounders. And a second switch for switching whether to supply each output of the plurality of pronunciation elements to the tone generator. It is a device.
[0009]
According to a fourth aspect of the present invention, in the tone signal generating apparatus according to the first or third aspect, the tone color adding module changes a pitch of a tone signal generated in each of the plurality of sounders. It is characterized by being.
According to a fifth aspect of the present invention, in the tone signal generating apparatus according to the first or third aspect, the tone color adding module changes an amplitude of a tone signal generated by each of the plurality of sounders. It is characterized by being.
According to a sixth aspect of the present invention, in the musical tone signal generating device according to the second or third aspect, the tone color changing means determines a harmonic content of a tone signal output from each of the plurality of sounders. It is characterized by being changed.
[0010]
According to a seventh aspect of the present invention, there is provided at least one sound generator for synthesizing a musical tone based on a first musical tone synthesizing method and a musical tone based on a second musical tone synthesizing method different from the first musical tone synthesizing method. A plurality of sound generators each including at least one sounding element, each of which generates an independent musical tone signal, and first synthesizing means for synthesizing an output of a predetermined sounding element among the plurality of sounding elements; Tone changing means for performing predetermined processing on a tone signal output from the synthesizing means, an output of the tone color changing means, and an output of a sounding element of the plurality of sounding elements which is not connected to the first synthesizing means. And a second synthesizing means for synthesizing the tone signal.
According to an eighth aspect of the present invention, in the musical tone signal generating device according to the first or third aspect, the switching information and the parameters supplied from the outside are received, and the parameters are set in the tone color adding module. It is characterized by comprising control means for switching the switching means based on information.
[0011]
According to a ninth aspect of the present invention, in the musical tone signal generating device according to the second or third aspect, the switching information and parameters supplied from the outside are received, and the parameters are set in the tone color changing means. It is characterized by comprising control means for switching the switching means based on information.
According to a tenth aspect of the present invention, in the musical sound signal generating apparatus according to the first or third aspect, a storage unit storing music data including musical sound data and time data, and reading music data in the storage unit. A sequencer for sequentially outputting the tone data in accordance with the time data, interpreting the tone data output from the sequencer, and assigning the tone of the sounder, setting the parameters of the tone color adding module, and switching the switching means according to the result. Means for performing processing.
[0012]
According to an eleventh aspect of the present invention, at least one sound generator for synthesizing a musical tone based on a first musical tone synthesizing method, and a musical tone based on a second musical tone synthesizing method different from the first musical tone synthesizing method. A plurality of sound generators each including at least one sounder, each of which generates an independent tone signal; and a tone color changing means for performing a predetermined process on a sound signal output from at least a part of the plurality of sounders. Switching means for switching whether to supply each output of the plurality of pronunciation elements to the timbre changing means, and output of each of the plurality of pronunciation elements which are not supplied to the timbre changing means. And a synthesizing means for synthesizing the output of the tone color changing means and outputting the synthesized tone signal.
According to a twelfth aspect of the present invention, in the tone signal generating apparatus according to the eleventh aspect, the timbre changing means includes white noise mixing means for mixing white noise with an input tone signal. .
[0013]
According to a thirteenth aspect of the present invention, in the tone signal generating apparatus according to the eleventh aspect, the tone color changing means includes a low-pass filter for removing a high-frequency component of the input tone signal.
According to a fourteenth aspect of the present invention, in the musical tone signal generating device according to the thirteenth aspect, there is provided a time varying circuit for changing a cutoff frequency of the low-pass filter over time.
According to a fifteenth aspect of the present invention, in the musical tone signal generating device according to the fourteenth aspect, the time varying circuit changes the cutoff frequency based on white noise over time.
According to a sixteenth aspect of the present invention, in the musical tone signal generating device according to any one of the thirteenth to fifteenth aspects, the tone color changing means enhances a signal near a cutoff frequency of the low-pass filter. And a circuit.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a tone generator circuit of a tone signal generating device according to a first embodiment of the present invention, and FIG. 2 is a block diagram showing an entire configuration of the tone signal generating device. In FIG. 2, reference numeral 1 denotes a keyboard based on the MIDI (Musical Instrument Digital Interface) standard, which outputs MIDI standard musical sound data (hereinafter referred to as MIDI data) in response to a user's key operation. The keyboard 1 includes a keyboard composed of a black key and a white key, a switch for the user to set various parameters such as tone parameters, on / off of a black key and a white key, and on / off of a parameter setting switch. A MIDI data generation circuit is provided for detecting OFF and generating MIDI data according to the detection result.
[0015]
Reference numeral 2 denotes a storage unit that stores music files based on standards such as SMF (Standard MIDI File) and SMAF, and 3 denotes a sequencer. The sequencer 3 reads out the music file from the storage unit 2 and temporarily stores it therein. When the temporarily stored music file is an SMF, the MIDI data included in the music file is also included in the music file. Output sequentially according to time data. Reference numeral 4 denotes a synthesizing or switching circuit, which synthesizes the output of the keyboard 1 and the output of the sequencer 3 according to the changeover switch, or selects one of the outputs and outputs it to the tone generator 5.
[0016]
Next, details of the tone generator 5 will be described with reference to FIG.
In FIG. 1, 7-1 to 7-n are tone generators for generating musical tone signals based on MIDI data output from the synthesis or switching circuit 4 shown in FIG. A plurality of tone signal generation methods are used for the sound generators 7-1 to 7-n. For example, the sound generator 7-1 is a WT (waveform table) method, and the sound generators 7-2 to 7- ( n-1) generates musical tone signals according to the FM method, and the sound generator 7-n generates musical tone signals according to the VA (physical model) method.
[0017]
FIG. 3 is a block diagram showing the configuration of the sounder 7-1 (WT method). In this figure, reference numeral 9 denotes a phase generator (PG) for forming sawtooth-varying phase data based on pitch information and basic timbre information. The PG 9 accumulates pitch information at a predetermined rate, and resets the accumulated portion each time the accumulated value reaches a value specified by the basic tone color information. And an adder for adding an offset value specified by the information. The synthesizing circuit 10 synthesizes (eg, adds) the pitch information and data supplied via the selector 15-1 in FIG. 1, and outputs the result to the PG 9. By supplying the output of PG 9 to WT (waveform table) 11, tone waveform data (digital data) is read from WT 11 and output to synthesis circuit 12. The synthesis circuit 12 synthesizes (eg, adds) the envelope data output from the amplitude envelope (EG) generation circuit 12a and the data supplied via the selector 16-1 in FIG. 1, and outputs the synthesis result and the output from the WT 11. The musical tone waveform data to be synthesized (for example, multiplied). That is, the output tone waveform of the WT 11 is given an envelope by the output of the amplitude envelope generating circuit 12a, and further, tone waveform data subjected to amplitude modulation based on the output data of the selector 16-1 is output.
[0018]
As described above, the tone generator 7-1 is a circuit for generating a musical tone waveform by the WT method, the pitch of the musical tone waveform is modulated by the output data of the selector 15-1, and the tone waveform is modulated by the output data of the selector 16-1. Is modulated.
Similarly, the pitch of the musical tone waveform of the sound generator 7-2 is modulated by the output data of the selector 15-2, and the amplitude of the musical tone waveform is modulated by the output data of the selector 16-2. The same applies to the pronunciation elements 7-3 to 7-n.
[0019]
Next, in FIG. 1, reference numeral 20 denotes a pitch LFO (Low Frequency Oscillator) as a tone color adding module, which generates a low-frequency waveform for pitch modulation and outputs the waveform to the synthesizing circuit 22. The waveform shape (sine wave, triangle wave, square wave), frequency and amplitude are set as module parameters described later. Reference numeral 21 denotes a pitch EG (envelope generator) as a tone color adding module, which generates an envelope signal for fluctuation at the time of pitch and outputs it to the synthesizing circuit 22. In the case of an envelope signal, an initial value, a target value, a change rate, and the like are set as module parameters. Here, module parameters (setting information) for setting each characteristic of the pitch LFO 20 and the pitch EG 21 are included in the Exclusive Message of the MIDI data output from the synthesis or switching circuit 4 (FIG. 2). Further, the pitch LFO 20 described above can provide a vibrato effect to the musical sound data generated by the pronunciation elements 7-1 to 7-n.
[0020]
The synthesis circuit 22 synthesizes (for example, adds) the output of the pitch LFO 20 and the output of the pitch EG21, and outputs the result to the selectors 15-1 to 15-n. Each of the selectors 15-1 to 15-n is output from the combining circuit 22 or preset according to the module patch information included in the Control Change (and the Exclusive Message) of the MIDI data output from the combining or switching circuit 4. One of the fixed values is selected and output to the pronunciation units 7-1 to 7-n.
[0021]
An amplitude LFO 23 generates a low-frequency waveform for amplitude modulation and outputs the waveform to the selectors 16-1 to 16-n. The setting information for setting each characteristic (waveform shape, frequency and amplitude) of the amplitude LFO 23 is included as a module parameter in the Exclusive Message of the MIDI data output from the synthesis or switching circuit 4. With this amplitude LFO23, a tremolo effect can be added to the musical sound data generated by the sound generators 7-1 to 7-n. Each of the selectors 16-1 to 16-n outputs the amplitude LFO 23 or a preset fixed value in accordance with the module patch information included in the control change (and the exclusive message) of the MIDI data output from the synthesis or switching circuit 4. One of the values is selected and output to the pronunciation units 7-1 to 7-n.
[0022]
Reference numeral 25-1 denotes a selector, which outputs the output of the pronunciation element 7-1 to the synthesizing circuit 26 or 27 according to the module patch information included in the Control Change (also Exclusive Message) of the MIDI data. Similarly, the selector 25-2 outputs the output of the sound generator 7-2 to the synthesizing circuit 26 or the synthesizing circuit 27 according to the switching signal, and the selector 25-n converts the output of the sound generator 7-n into a switching signal. The signal is output to the combining circuit 26 or the combining circuit 27 accordingly. The combining circuit 26 combines (eg, adds) the outputs of the selectors 25-1 to 25-n and outputs the combined output to the time-variation filter 28.
[0023]
Reference numeral 29 denotes a filter LFO, which generates a low-frequency waveform and outputs it to the synthesis circuit 31. Reference numeral 30 denotes a filter EG, which generates an envelope signal for filter control and outputs the envelope signal to the synthesis circuit 31. The setting information for setting the characteristics of the filter LFO 29 and the filter EG30 is included in the Exclusive Message of MIDI data. Further, the filter LFO 29 can impart a wah wah effect to the generated musical sound. Further, the filter EG30 can be used to simulate a declining timbre of a musical instrument or to intentionally add a timbre change.
[0024]
The combining circuit 31 combines (eg, adds) the outputs of the filter LFO 29 and the filter EG 30 and outputs the combined output to the time-varying filter 28. The time-varying filter 28 is a circuit that changes the harmonic component by filtering the digital tone data output from the synthesis circuit 26, thereby subtly changing the timbre. fluctuate. At this time, the output of the variation filter 28 is applied to the synthesis circuit 27.
[0025]
The synthesizing circuit 27 synthesizes (eg, adds) the output of the time-varying filter 28 and the outputs of the selectors 25-1 to 25-n, and outputs the result as musical sound data. The output of the synthesizing circuit 27 is converted into an analog signal and supplied to a speaker.
[0026]
As described above, according to the tone generator 5 described above, the selectors 15-1 to 15-n and 16-1 to 16-n add vibrato, tremolo, and the like to each of the generated musical sound data of the sound generators 7-1 to 7-n. Can be freely selected to be given or not. Also, the tone color modulation by the time-varying filter 28 can be applied only to the output of the pronunciation element 7 selected by the selectors 25-1 to 25-n, and an effect such as wah-wah can be provided.
[0027]
Next, the operation of the above-described embodiment will be described.
(1) Operation of sound source circuit 5
FIG. 4 is a flowchart for explaining the operation of the tone generator 5. When the MIDI data is supplied from the synthesis or switching circuit 4, a control circuit (not shown) provided in the tone generator 5 interprets the MIDI data (step Sa1). Next, it is determined whether or not the MIDI data is module setting information (step Sa2). If the MIDI data is module setting information, module parameters are set (step Sa3). That is, parameters are set in the pitch LFO 20, the pitch EG21, the amplitude LFO23, the filter LFO29, and the filter EG30 in FIG. If it is not module setting information, step Sa3 is skipped and the process proceeds to step Sa4.
[0028]
In step Sa4, it is determined whether or not the MIDI data is module patch information. If it is module patch information, the information is temporarily registered in the control circuit (step Sa5). If it is not module patch information, the process skips step Sa5 and proceeds to step Sa6. In step Sa6, it is determined whether or not the MIDI data is a note message. If the message is a note message, the process proceeds to step Sa7. In step Sa7, first, a channel assignment process (DVA process), that is, the sound of the note message is assigned to any of the pronunciation members 7-1 to 7-n. Next, a patch switching process is performed. That is, the selectors 15-1 to 15-n, 16-1 to 16-n, and 25-1 to 25-n are switched in accordance with the module patch information registered therein in step Sa5. As will be described later, in place of the process of performing the patch switching after the DVA process, a sound element to which the sound color module is added and a sound element to which the sound color module is not added are fixedly determined in advance. May be assigned to the pronunciation unit to which the tone color module is connected.
[0029]
If the result of the determination in step Sa6 is "NO", other event processing is performed (step Sa8). Next, the process proceeds to step Sa9, where it is determined whether or not the music has ended. If the determination result is "NO", the process returns to step Sa1 again, and the above process is repeated. If the result of the determination in step Sa9 is "YES", the process is terminated.
[0030]
(2) Operation when reproducing sequence data
FIG. 5 is a flowchart showing the operation when reproducing the sequencer data (song data) in the storage unit 2 (FIG. 2). When reproducing the sequencer data, the user first selects a music piece using the operation switch (step Sb1). When a music piece is selected, sequencer data is loaded from the storage unit 2 to the sequencer 3, and the format interpretation is performed in the sequencer 3 (step Sb2). Next, when music start is instructed by the user (step Sb3), the music sequence control operation in the sequencer 3 starts (step Sb4).
[0031]
Thereafter, the sequencer 3 sequentially transmits the MIDI data to the tone generator 5 via the synthesizing or switching circuit 4 (step Sb5). The tone generator 5 receives the MIDI data and forms musical tone data by the above-described processing (step Sb6), and the processing of steps Sb5 and Sb6 is repeated until the music ends. When it is determined that the music has ended (step Sb7), a sequencer end process is performed (step Sb8).
[0032]
(3) Operation during real-time performance
FIG. 6 is a flowchart showing the operation at the time of real-time performance. In the case of a real-time performance, the user first sets each timbre information using the setting switch of the keyboard 1 (step Sc1). Here, the timbre information includes timbre additional information such as vibrato in addition to the timbre. When the setting is performed by the setting switch, the MIDI data generation circuit of the keyboard 1 generates the module patch information for selector setting and the parameters of the pitch LFO 20, the pitch EG21, the amplitude LFO23, the filter LFO29, and the filter EG30. The signal is output to the tone generator 5 through the step 4 (step Sc2). As a result, in the tone generator 5, the setting of the pitch LFO 20, etc., and the switching of the selectors 15-1 to 15-n, 16-1 to 16-n, and 25-1 to 25-n are performed.
[0033]
Next, when the user performs with the white key and the black key of the keyboard 1 (step Sc3), the MIDI data generation circuit generates MIDI data and transmits it to the tone generator circuit 5 via the synthesis or switching circuit 4 (step Sc3). Sc4). The tone generator 5 receives the MIDI data and generates tone data (step Sc5).
In the configuration of FIG. 2, the sequencer 3 and the tone generator 5 may have either a software configuration or a hardware configuration.
[0034]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a block diagram illustrating a configuration of a sound source circuit 5a according to the second embodiment. The tone generator circuit 5a is provided with m sounding elements, and outputs of n (n <m) sounding elements are applied to the synthesizing circuit 35. The synthesizing circuit 35 synthesizes (for example, adds) the outputs of the n pronunciation elements and outputs the resultant to the tone color adding module 36. The tone color adding module 36 adds a tone color to the output of the synthesizing circuit 35 and outputs the result to the synthesizing circuit 37. In this example, the tone color adding module 36 includes a filter LFO, a filter EG, and a time-varying filter. The pitch LFO, the pitch EG, and the amplitude LFO may be fixedly applied to the sound elements 1 to n.
The synthesizing circuit 37 synthesizes (for example, adds) the output of the tone color adding module 36 and the output of the sound generator not connected to the synthesizing circuit 35, and outputs the result as musical sound data to an A / D converter (not shown).
[0035]
As described above, in the above-described embodiment, the tone generator that can perform tone addition is predetermined, and therefore, the tone requiring the tone addition is assigned to each of the tone generators 1 to n, and the tone not requiring the tone addition is assigned. It is assigned to pronunciation element (n + 1) to pronunciation element m. According to this embodiment, the number of sounds to which the timbre can be added is limited, but the configuration is simplified.
Note that the tone color adding module may be an effector that gives effects such as reverb and chorus, or may be a 3D sound processing circuit.
[0036]
Next, a third embodiment of the present invention will be described. FIG. 10 is a block diagram illustrating a configuration of a sound source circuit 5b according to the third embodiment. In this figure, reference numerals 51 and 52 denote tone generators for generating musical tone waveforms based on the MIDI data output from the synthesis or switching circuit 4 shown in FIG. 2, respectively. The tone generator 51 generates tone waveforms by the WT method. The tone generator 52 generates a tone signal by the FM method. Reference numeral 53 denotes a selector, which selects and outputs one of the outputs of the pronunciation elements 51 and 52 according to the module patch information included in the MIDI data. Numeral 54 denotes a tone color adding module for adding another tone to the output of the selector 53, a white noise generator 56 for generating white noise, a multiplier 57 for adjusting the output level of the white noise generator 56, and a selector 53. And a time-varying LPF (low-pass filter) 59 for changing the frequency characteristic of the output of the mix circuit 58.
[0037]
FIG. 11 is a block diagram showing the configuration of a time-varying LPF. In this figure, reference numeral 59a denotes a digital LPF, and reference numeral 59b denotes a time-varying circuit for changing the cutoff frequency of the LPF 59a with time. In the LPF 59a, 61 is an adder for adding the signal of the input terminal IN (the output of the mix circuit 58) and the output of the multiplier 62, 63 is an adder for adding the output of the adder 61 and the output of the delay circuit 64, and 65 Is a multiplier for multiplying the output of the adder 63 by the output of the time varying circuit 59b (the output of the synthesizing circuit 75), 66 is a subtractor for subtracting the output of the multiplier 65 from the output of the delay circuit 67, and 62 is a delay circuit 67 Is a multiplier which multiplies the output of the adder 66 by the output of the time varying circuit 59b, and 69 is an adder which adds the output of the multiplier 68 and the output of the delay circuit 64. The output of the adder 69 is output to the next stage.
Here, both the delay circuits 64 and 67 are circuits that delay the input signal by one cycle of the system clock pulse and output the delayed signal. The constant supplied to the multiplier 62 is included in the module setting information of the MIDI data.
[0038]
Next, in the time-varying circuit 59b, reference numeral 71 denotes an envelope generator, which generates and outputs an envelope signal for tone color control. A low-frequency signal generator 72 generates a low-frequency signal (see FIG. 12B) and outputs it to the sample-hold circuit 73 and the selector 74. The sample-and-hold circuit 73 samples the output of the white noise generator 56 (see FIG. 12A) at the rising timing of the low-frequency signal generator 72, and outputs it to the selector 74. The selector 74 selects one of the output of the low-frequency signal generator 72 and the output of the sample-and-hold circuit 73 based on the module patch information included in the MIDI data, and outputs the selected output to the synthesizing circuit 75. The synthesizing circuit 75 synthesizes (eg, adds) the output of the envelope generator 71 and the output of the selector 74 and outputs the result to the multipliers 65 and 68.
[0039]
In the above-described LPF 59a, the configuration other than the multiplier 62 is a known digital LPF, and the cutoff frequency changes according to data (output of the synthesis circuit 75) applied to the multipliers 65 and 68. When the cutoff frequency moves to the lower frequency side, many overtones, including overtones of relatively low frequencies, are cut off, and the tone becomes darker and rounder. On the other hand, when the cutoff frequency moves to the higher frequency side, the number of harmonics to be cut decreases, and the tone color becomes brighter. However, even if it becomes bright, it only means that it becomes relatively bright and it returns to the original sounding state.
[0040]
In the circuit shown in FIG. 11, the timbre of the tone signal changes variously by changing the data applied to the multipliers 65 and 68 by the time varying circuit 59b. In this case, when the selector 74 selects the output of the sample and hold circuit 73, the cutoff frequency of the LPF 59 a changes randomly for each cycle of the low frequency signal generator 72.
[0041]
On the other hand, the multiplier 62 is provided for resonance. Resonance is control for changing the tone by emphasizing sounds near the cut-off frequency (see the curve L in FIG. 13). It is possible to emphasize specific overtones or add new overtones to the original sound. it can. The resonance effect changes depending on the setting of the cutoff frequency. In general, resonance adds a distinctive, well-defined sound. When the setting of the cutoff frequency is changed while the resonance is applied, the frequency of the emphasized harmonic moves, so that a unique effect called “Mirau” often used for an analog bass or the like can be reproduced. When resonance is applied, the level near the cutoff frequency is raised, while the level is lowered for frequencies lower than the cutoff frequency (see FIG. 13).
[0042]
Returning to FIG. 10, the output of the time varying LPF 59 is supplied to the selectors 81 and 82. The selectors 81 and 82 select either the output of the sounder 51 (or 52) or the output of the time-varying LPF 59 according to the module patch information included in the MIDI data, and output the selected output to the mix circuit 83. The mix circuit 83 mixes and outputs the outputs of the selectors 81 and 82.
[0043]
In the tone generator 5b thus configured, the output of the selector 53 is mixed with the white noise output from the white noise generator 56 in the mix circuit 58. In this case, various tone colors can be controlled according to the mix ratio of white noise by the multiplier 57. Further, by passing the output of the mix circuit 58 through the time-varying LPF 59, more various timbre changes are possible. The tone generator circuit 5b can add a tone to the output of one of the sound generators 51 and 52 by the tone color adding module 54 and mix the output with the output of the other sound generator. It is also possible to select the selectors 81 and 82 so as not to add the timbre to the outputs of the children 51 and 52.
[0044]
【The invention's effect】
As described above, according to the present invention, the output of the timbre adding module is selectively made to act on the timbre, or the output of the timbre is selectively supplied to the timbre changing means. The generator can be constructed relatively inexpensively, and various effects can be given to a plurality of generated tone signals. Therefore, it is particularly suitable for use in generating musical tones in portable terminal devices and the like, and is also suitable for use in musical instruments that perform real-time performance. Further, according to the present invention, there is an advantage that the present invention can be applied to a plurality of tone synthesis devices.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a tone generator circuit of a musical sound signal generation device according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a tone signal generating device according to the first embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration of a pronunciation element 7-1 in FIG.
FIG. 4 is a flowchart for explaining the operation of the tone generator circuit shown in FIG. 1;
FIG. 5 is a flowchart for explaining the operation of the tone signal generating apparatus shown in FIG. 2;
FIG. 6 is a flowchart for explaining the operation of the musical sound signal generation device shown in FIG. 2;
FIG. 7 is a block diagram showing a configuration of a second embodiment of the present invention.
FIG. 8 is a block diagram showing a configuration example of a conventional tone signal generation device.
FIG. 9 is a block diagram illustrating another configuration example of a conventional tone signal generating device.
FIG. 10 is a block diagram showing a configuration of a third embodiment of the present invention.
11 is a block diagram showing a configuration of a time-varying LPF 59 in FIG.
12 is a waveform diagram showing output waveforms of a white noise generator 56 and a low frequency signal generator 72 in FIG.
FIG. 13 is a waveform chart for explaining an operation of multiplier 62 in FIG. 11;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Keyboard, 2 ... Storage part, 3 ... Sequencer, 5 ... Sound source circuit, 7-1 to 7-n ... Sound generator, 15-1 to 15-n, 16-1 to 16-n, 25-1 to 25 -N: selector, 20: pitch LFO, 21: pitch EG, 23: amplitude LFO, 28: time-varying filter, 29: filter LFO, 30: filter EG, 36: tone color adding module, 51, 52 ... sound generator, 53 ... selector, 54 ... tone color adding module, 56 ... white noise generator, 57 ... multiplier, 58 ... mix circuit, 59 ... time-varying LPF, 59a ... LPF, 59b ... time-varying circuit, 61, 63, 69 ... adder , 66 ... subtractor, 62, 65, 68 ... multiplier, 64, 67 ... delay circuit, 71 ... envelope generator, 72 ... low frequency signal generator, 73 ... sample and hold circuit, 74 ... selector 5 ... synthetic circuit.

Claims (16)

At least one sounding element for synthesizing a musical tone based on a first musical sound synthesizing method, and at least one sounding element for synthesizing a musical sound based on a second musical sound synthesizing method different from the first musical sound synthesizing method; A plurality of pronunciation elements, each of which produces an independent tone signal;
A tone color adding module for performing a predetermined process on a tone signal generated by at least a part of the plurality of pronunciation elements,
A plurality of switching means for switching whether or not to apply the tone color adding module to each of the plurality of pronunciation elements;
A tone signal generating device comprising: At least one sounding element for synthesizing a musical tone based on a first musical sound synthesizing method, and at least one sounding element for synthesizing a musical sound based on a second musical sound synthesizing method different from the first musical sound synthesizing method; A plurality of pronunciation elements, each of which produces an independent tone signal;
Tone color changing means for performing a predetermined process on a tone signal output from at least a part of the plurality of pronunciation elements,
Switching means for switching whether or not each output of the plurality of pronunciation elements is supplied to the tone color changing means;
A tone signal generating device comprising: At least one sounding element for synthesizing a musical tone based on a first musical sound synthesizing method, and at least one sounding element for synthesizing a musical sound based on a second musical sound synthesizing method different from the first musical sound synthesizing method; A plurality of pronunciation elements, each of which produces an independent tone signal;
A tone color adding module for performing a predetermined process on a tone signal generated by at least a part of the plurality of pronunciation elements,
First switching means for switching whether or not to apply the output of the tone color adding module to each of the plurality of pronunciation elements;
Tone color changing means for performing a predetermined process on a tone signal output from at least a part of the plurality of pronunciation elements,
Second switching means for switching whether to supply each output of the plurality of pronunciation elements to the tone color changing means,
A tone signal generating device comprising: The tone signal generating apparatus according to claim 1, wherein the tone color adding module changes a pitch of a tone signal generated in each of the plurality of pronunciation elements. 4. The musical tone signal generating apparatus according to claim 1, wherein the tone color adding module changes an amplitude of a musical tone signal generated in each of the plurality of pronunciation elements. 4. The tone signal generating apparatus according to claim 2, wherein said tone color changing means changes a harmonic content of a tone signal output from each of said plurality of pronunciation elements. At least one sounding element for synthesizing a musical tone based on a first musical sound synthesizing method, and at least one sounding element for synthesizing a musical sound based on a second musical sound synthesizing method different from the first musical sound synthesizing method; A plurality of pronunciation elements, each of which produces an independent tone signal;
First synthesizing means for synthesizing an output of a predetermined phonetic oscillator among the plurality of phonemes,
Tone color changing means for performing predetermined processing on the tone signal output from the synthesis means,
Second synthesizing means for synthesizing an output of the timbre changing means and an output of a pronunciation element not connected to the first synthesis means among the plurality of pronunciation elements;
A tone signal generating device comprising: 2. The control device according to claim 1, further comprising control means for receiving switching information and parameters supplied from the outside, setting the parameters in the tone color adding module, and switching the switching means based on the switching information. The musical tone signal generating device according to claim 3. 3. A control means for receiving switching information and parameters supplied from the outside, setting the parameters in the tone color changing means, and switching the switching means based on the switching information. The musical tone signal generating device according to claim 3. A storage unit in which music data including musical sound data and time data is stored;
A sequencer that reads out music data in the storage unit and sequentially outputs the musical sound data according to the time data;
Means for interpreting the tone data output from the sequencer, and performing tone assignment of the sound generator, parameter setting of the tone color adding module, and switching of the switching means according to the result;
The tone signal generating device according to claim 1 or 3, further comprising: At least one sounding element for synthesizing a musical tone based on a first musical sound synthesizing method, and at least one sounding element for synthesizing a musical sound based on a second musical sound synthesizing method different from the first musical sound synthesizing method; A plurality of pronunciation elements, each of which produces an independent tone signal;
Tone color changing means for performing a predetermined process on a tone signal output from at least a part of the plurality of pronunciation elements,
Switching means for switching whether or not each output of the plurality of pronunciation elements is supplied to the tone color changing means;
Synthesizing means for synthesizing and outputting an output not supplied to the tone color changing means and an output of the tone color changing means among the outputs of the plurality of pronunciation elements,
A tone signal generating device comprising: 12. The tone signal generating apparatus according to claim 11, wherein said tone color changing means includes white noise mixing means for mixing white noise with an input tone signal. The tone signal generating apparatus according to claim 11, wherein the tone color changing means includes a low-pass filter for removing a high-frequency component of the input tone signal. 14. The tone signal generating apparatus according to claim 13, further comprising a time varying circuit that changes a cutoff frequency of the low-pass filter with time. 15. The tone signal generating apparatus according to claim 14, wherein the time varying circuit changes the cutoff frequency based on white noise as time passes. 16. The tone signal generating apparatus according to claim 13, wherein said tone changing means includes a resonance circuit for emphasizing a signal near a cutoff frequency of said low-pass filter.

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